Magento2 Stores and Scopes

Update Oct 2015: This version is outdated as the store package has been refactored between 0.74.0-beta4 and 1.0.0-beta.

See updated post here.

Exploring the Store package and its init process with scopes in Magento2 (0.74.0-beta4) and Magento1 (1.9 CE).

Twig Template Engine For Magento2

Magento2 itself uses PHP as the template engine (as what PHP has been developed for in ~1996 ;-) ).

The Twig template engine cannot execute directly PHP code which seems more secure.